I have some good news. :) You should start to see many of those Error pages start to work again. I've tested about a dozen, and the Moderators are reporting back to me with news that most of their links are working too. There are still a few exceptions, and we'll start looking at them on a case-by-case basis.
Fixing the Error pages was item #2 on my first update last week (Message Board Fixes - Update ). As I mentioned, the Error pages were caused by the presence of the "Visitor (Not Verified)" accounts. In short, we made the pages more forgiving -- so that they show the "Visitor" users (like we see on the homepage) which at least allows the pages to show up.
This is just part 1 of the solution to the "Visitor" issue though. Part 2 involves actually resolving whose accounts these are, which is something the database team will need more time with. We're making progress, though!
Next: let's get our Replies back!